Evolution of Paleozoic West Junggar Basin,NW China:Seismic data,detrital zircon evidence from Earth's oldest alkali lake deposit

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外文摘要：The Permian Fengcheng Formation of the Western Junggar region in the Southwestern Central Asian Orogenic Belt(CAOB)represents one of Earth's oldest alkali lake deposits.Here,we present a comprehen-sive study of the stratigraphy,petrography,two-dimensional seismic data,U-Pb geochronology,and Hf isotope analysis of detrital zircons of this deposit.The results,in conjunction with published data,reflect the tectonic evolution of southwestern CAOB.The ages of detrital zircons indicate that the Fengcheng Formation deposition is inferred to have concluded the early Permian Kungurian.The Hf isotopes of detri-tal zircons indicate that the detritus for the Fengcheng Formation was derived from upper crustal mag-matic sources.The West Junggar Basin preserves the records of three Paleozoic tectonic stages.The first stage occurred in the Early Paleozoic and involved intraoceanic subduction and arc-continent collision.The second stage involved the Carboniferous closure of the Junggar Ocean following successive filling of oceanic basins.The final stage occurred in the Early Permian and was related to intracontinental rifting and tectonic inversion.The results of comparing the comprehensive data of U-Pb ages and Hf isotopes of 2537 zircons from West Junggar,Tianshan and Altay show that the orogenic belts to the south of the CAOB experienced similar plate kinematics and vertical crustal growth in the Paleozoic.

外文关键词：

Detrital zircon datingAlkali lake depositMultiple tectonic eventsCrustal growthCentral Asian Orogenic Belt

作者：

Dongming Zhi、Deyu Gong、Mingxin Liu、M.Santosh、Zhijun Qin、Qiang Ren、Xinwei Chen、Hao Zou

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作者单位：

Xinjiang Research Base,Huairou Laboratory,Urumchi 830000,China

Research Institute of Petroleum Exploration & Development,PetroChina,Beijing 100083,China

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu,Sichuan 610059,China

School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China

School of Physics,Chemistry and Earth Science,University of Adelaide,Adelaide,SA 5005,Australia

Yonsei Frontier Laboratory,Yonsei University,Seoul 120-749,Republic of Korea

Xinjiang Oilfield Company,PetroChina,Karamay 834000,China

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出版年：

2024

DOI：

10.1016/j.gsf.2024.101887

地学前缘(英文版)

中国地质大学（北京）北京大学

地学前缘(英文版)

CSTPCD

影响因子：0.576

ISSN：1674-9871

年,卷(期)：2024.15(6)